using System;
using System.Globalization;
using LCU.Library.DocumentType.Extensions;
using LCU.Library.Internal.DocumentIngestorModels.Constants;
using LCU.Library.Internal.DocumentIngestorModels.Models;

namespace LCU.Library.Internal.DocumentIngestorModels.Validations
{
    public static class MetaDataValidation
    {
        public static ProcessResult ValidateAccountNumber(ProcessResult processResult, string accountNumber)
        {
            if (string.IsNullOrWhiteSpace(accountNumber) || accountNumber == "0")
            {
                processResult = ProcessResult.ProcessDataMappingFailure(processResult, ValidationMessages.AccountInvalidMessage);
            }

            return processResult;           
        }

        public static ProcessResult ValidateFileName(ProcessResult processResult, string fileName)
        {
            if (string.IsNullOrWhiteSpace(fileName))
            {
                processResult = ProcessResult.ProcessDataMappingFailure(processResult, ValidationMessages.FileNameInvalidMessage);
            }

            return processResult;
        }

        public static ProcessResult ValidateFullName(ProcessResult processResult, string fullName)
        {
            if (string.IsNullOrWhiteSpace(fullName))
            {
                processResult = ProcessResult.ProcessDataMappingFailure(processResult, ValidationMessages.FullNameInvalidMessage);
            }

            return processResult;
        }

        public static ProcessResult ValidateDocumentType<T>(ProcessResult processResult, string documentType) where T: Enum
        {
            if (string.IsNullOrWhiteSpace(documentType) || !EnumExtensions.IsDocumentTypeOf<T>(documentType))
            {
                processResult = ProcessResult.ProcessCriticalFailure(processResult, $"{ValidationMessages.DocumentTypeInvalidMessage}. Document Type provided was {documentType}, which was not of type {typeof(T).Name}");
            }

            return processResult;
        }
        
        public static ProcessResult ValidatePdf(ProcessResult processResult, string pdf)
        {
            if (string.IsNullOrWhiteSpace(pdf))
            {
                processResult = ProcessResult.ProcessDataMappingFailure(processResult, ValidationMessages.PdfInvalidMessage);
            }

            return processResult;
        }

        public static ProcessResult ValidateTin(ProcessResult processResult, string tin)
        {
            if (string.IsNullOrWhiteSpace(tin) || tin == "0")
            {
                processResult = ProcessResult.ProcessDataMappingFailure(processResult, ValidationMessages.TinInvalidMessage);
            }

            return processResult;
        }

        public static ProcessResult ValidateDate(ProcessResult processResult, string date, string format)
        {
            try{
                if (string.IsNullOrEmpty(date) || !DateTime.TryParseExact(date, format, CultureInfo.InvariantCulture, DateTimeStyles.AssumeLocal, out _)){
                    return ProcessResult.ProcessDataMappingFailure(processResult, $"{ValidationMessages.CreationDateInvalidMessage}. Date provided {date} could not be parsed from format {format}");
                }
            }
            catch (Exception){
                return ProcessResult.ProcessDataMappingFailure(processResult, ValidationMessages.CreationDateInvalidMessage);
            }
            return processResult;
        }
    }
}